CN102412544B - Power-uninterrupted ice melting and SVG-type reactive static compensation compound device and use method thereof - Google Patents
Power-uninterrupted ice melting and SVG-type reactive static compensation compound device and use method thereof Download PDFInfo
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- CN102412544B CN102412544B CN201110410482.4A CN201110410482A CN102412544B CN 102412544 B CN102412544 B CN 102412544B CN 201110410482 A CN201110410482 A CN 201110410482A CN 102412544 B CN102412544 B CN 102412544B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/16—Devices for removing snow or ice from lines or cables
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
Abstract
The invention discloses a power-uninterrupted ice melting and SVG-type reactive static compensation compound device and a use method thereof. The device at least comprises two sets of converters, wherein the DC (direct current) sides of the two sets of converters share a set of DC capacitors to form a back-to-back conversion system, the AC (alternating current) side of the first set of converters is connected with the low-voltage side of a first converter transformer, the AC side of the second set of converters can be respectively connected with the low-voltage side of the first converter transformer or a second converter transformer through a switch disconnecting link, the high-voltage side of the first converter transformer is connected parallel to an alternating current bus of a transformer station, the high-voltage side of the second converter transformer is connected to a line to be subjected to ice melting in series through the switch disconnecting link, and the compound device is controlled by a comprehensive controller to operate. The use method of the compound device comprises a power-uninterrupted ice melting operating state and a reactive static compensation operating state, and the stability of a system can not be destroyed.
Description
Technical field
The present invention relates to a kind of electric device, particularly one both to have can be used for not having a power failure ice-melt to power circuit, can be used for again set composite and the using method thereof of electrical network being carried out to the idle static compensation of SVG type.
Background technology
Power circuit icing problem, in different all will the occurring of the annual degree in south China part provinces and regions, especially that rare ice damage in 2008 brings major disaster to the electrical network of southern all provinces, and long-time, large-area power-cuts affects huge on national economy and people's lives.Electrical network icing is also the major issue of countries in the world general concern.
Retrieve the de-icing technology of international and domestic power circuit, conventional is divided into two classes: one is when occurrence of large-area icing, after line out of service, adopt artificial deicing or mechanical deicing, de-icing work amount is large, and interruption duration is long, economic loss is serious, and mechanical deicing's method does not have maturation.Equations of The Second Kind is thermal ice-melting, and thermal ice-melting is divided into again power failure ice-melt and ice-melt two class that do not have a power failure.
The common method of power failure ice-melt has following two kinds:
1, ac short circuit up-flow ice-melt.Be connected in series 2 ~ 3 by switch operation for DC ice-melting (as 110KV or 220KV circuit), tandem link end man-made short-circuit, first section directly adds AC power (as 10KV or 35KV) and carries out short circuit ice-melt.This is method the most frequently used in the ice-melt practice of all provinces in south, and its advantage does not need special equipment, and production scene is very practical.Shortcoming is that the voltage of its short circuit power supply is non-adjustable, will calculate in advance to the number of series circuit, selected difficulty, impacts comparatively large during switching power supply to electrical network, also needs to adjust protection definite value and protection investing method temporarily.In relevant several transformer stations, all to vacate the serial connection of a bus for DC ice-melting, make power system operating mode more weak.The switch operation time is long, is difficult to tackle ice-melt requirement when icing occurs many circuits simultaneously.This method had both consumed meritorious in short circuit up-flow process, and consume a large amount of idle again, reactive power consumption amount is approximately 4 times of meritorious consumption, very large on line voltage impact, so that cannot use at 500KV and Above Transmission Lines.
2, utilize the idle static compensation device of SVC as deicing device, direct-current short circuit ice-melt is carried out to circuit.After this is that rare ice damage in 2008, develop the deicing device put into operation.When after circuit generation icing, by line outage, line end man-made short-circuit, first adds the direct voltage exported through the idle static compensation device rectification of SVC type, carries out direct-current short circuit ice-melt, carry out ice-melt again after terminating to third phase to the two-phase of circuit in the two-phase of first section.Its advantage is that the direct voltage that device exports is adjustable, can be adapted to the circuit of any length and electric pressure.To compare not consumption systems idle with ac short circuit ice-melt.As ice-melting device during icing, at ordinary times as idle static compensation arrangement, utilization rate of equipment and installations is high.Shortcoming once can only melt two-phase, and the ice-melt time is long, switch operation and manually to arrange short-circuit line workload large, and will have a power failure and carry out.
The method of ice-melt of not having a power failure mainly contains following two kinds:
1, adjustment System trend, strengthens the method for DC ice-melting load.By scheduling excision circuit, the load transfer plan of two circuits is made its ice-melt to a circuit, or makes whole load currents of heavy ice line end transformer station all by a circuit of heavy icing area.The method is for the less 110kV in cross section and have certain feasibility with line, for the circuit of 220kV and above, because conductor cross-section is large, in addition the restriction of power system capacity and operational mode, and all there is system stability problem in all electric pressure circuits, adopt the actual effect of the method ice-melt increasing icing line load electric current to still need to study further, current theoretic discussion is more, does not have the case of practical application.
2, begin the seventies in last century, Baoji power supply administration is on the circuit of 110KV double bundle conductor, the geometrical clamp of the double bundle conductor that the part of path of icing easily occurs throughout the year is replaced by insulating blanked clamper, portion builds ice-melt station in the line, ice-melt circulation is added to every phase twin bundled wire, realize not having a power failure ice-melt with the concurrent thermal effect superposition of load current, this is the ice-melting mode that do not have a power failure of unique use at present.But every bar circuit all will build an ice-melt station, and equipment investment is large, and utilization rate of equipment and installations is low.Ice-melt station is built in the middle part of circuit, is generally place deep in the mountains, difficult in maintenance.Use object must be double bundle conductor, limitation be large, is difficult to popularity application.
In sum, the de-icing technology under existing not power failure mode does not have popularity and is worth, and power failure de-icing technology all will carry out under power failure mode, and greatly, the time is long, the more important thing is the reliable power supply affecting circuit for artificial mounting short-circuit line and power failure operation workload.
Summary of the invention
The defect existed for above-mentioned prior art or deficiency, in order to realize the quick practical ice-melt that do not have a power failure, and improve the utilance of equipment, the object of the invention is to, there is provided a kind of there is the ice-melt that do not have a power failure SVG type reactive static of holding concurrently to mend set composite (hereinafter referred to as set composite) and the using method thereof of two kinds of functions, use same set of device, when icing occurs for the ice-melt that do not have a power failure to power circuit, use as the idle static compensation arrangement of SVG type under electrical network normal operation.
In order to realize above-mentioned task, the present invention takes following technical solution to be achieved:
The one ice-melt that do not have a power failure is held concurrently SVG type reactive static plerosis locking device, it is characterized in that, have two groups of converters at least, its DC side shares one group of direct current capacitor and forms commutation system back-to-back, the AC of first group of converter is connected with the first converter transformer low-pressure side, the AC of second group of converter can be connected with the low-pressure side of the first converter transformer or the second converter transformer respectively by switching disconnecting link, the high-pressure side of the first converter transformer is connected to the ac bus of transformer station, the high-pressure side of the second converter transformer is serially connected with by switching disconnecting link on the circuit of wish ice-melt, set composite is by general controller controlling run.
When the first converter AC voltage is equal with substation bus bar voltage, the first converter transformer saves.
The above-mentioned ice-melt that do not have a power failure is held concurrently the using method of SVG type reactive static plerosis locking device, it is characterized in that, comprises following two kinds of operating states:
A) do not have a power failure ice-melt operating state: the AC of first group of converter is connected with the low-pressure side of the first converter transformer, the AC of second group of converter is connected with the low-pressure side of the second converter transformer, general controller controls first group of converter according to sine pulse midth modification (SPWM) and is in reactive static benefit operating state, controls second group of converter and is in ice-melt operating state;
B) reactive static mends operating state: the AC of two groups of converters in set composite, all be connected to the low-pressure side of the first converter transformer, general controller controls two groups of converters according to sine pulse midth modification (SPWM) and is synchronously in SVG type reactive static benefit running status, and the second converter transformer is in shut down condition.
The invention has the beneficial effects as follows: in a transformer station, be only equipped with a set of set composite, can to the circuit of all different electric pressure in transformer station, not had a power failure successively ice-melt by switch operation, cut throwing speed fast, ice-melt workload is little, both can tackle ice-melt during part circuit generation icing, and also can tackle ice-melt requirement during large area generation icing.Namely set of device can be used for the ice-melt to circuit, and electrical network is used as idle static compensation equipment under normal circumstances, and the utilance of equipment is high.Especially SVG type reactive power compensation technology, it is existing up-to-date reactive power compensation technology, both reactive power can be sent, also can absorbing reactive power, can from the rapid adjustment of carrying out continuously smooth the idle capacitive reactive power to rated capacity of the perception of rated capacity, the new technology becoming alternative SVC reactive-load compensation equipment starts popularization and application.The basis of implementing SVG application adds ice-melt function, small investment, and effect is large.Set composite can not destroy for system stability during ice-melt.
Accompanying drawing explanation
Fig. 1 is the key wiring diagram of set composite.HLQ1 and HLQ2 is the two groups of converters having shared one group of direct current capacitor, and the converter circuit be made up of the full control of GTO, IGBT, IGCT etc. in prior art power electronic device and reactor DK1, DK2, converting resistance R1 and R2 and filter LB forms.B1 and B2 is converter transformer, and K is for switching disconnecting link, and K1, K2, K3 are isolation switch, and MO is the bus of transformer station, and L is a circuit of transformer station, and DL is line switching, and 1DL is the control switch of set composite.
Fig. 2 is the theory diagram of general controller in set composite.
Fig. 3 is the equivalent circuit diagram of set composite under ice-melt operating state and phasor diagram.
Fig. 4 be set composite in electric power system for access schematic diagram during ice-melt.In figure, M1, M2, M0 represent three buses of First transformer station respectively, M3 and M4 represents the bus of second and the 3rd transformer station respectively, L1, L2, L3, L4 represent 4 circuits respectively, HLQ1, HLQ2 are the two groups of converters having shared one group of direct current capacitor, and B1, B2 are converter transformer.
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Embodiment
Fig. 1 describes the ice-melt that do not have a power failure and to hold concurrently the principle wiring of SVG type reactive static plerosis locking device (hereinafter referred to as set composite), the DC side of two groups of converters HLQ1, HLQ2 shares one group of direct current capacitor, AC and the first converter transformer B1 of the 1st group of converter HLQ1 are electrically connected on the bus M0 of transformer station, and the AC of the 2nd group of converter HLQ2 is electrically connected with diverter switch K.When K is in position 1, two groups of converter parallel runnings are in the low-pressure side of the first converter transformer B1, now general controller conventionally in sine pulse midth modification (SPWM) control two groups of converters and run on the idle static compensation work state of SVG type (SVG type reactive static benefit technology is prior art, therefore no longer describe in detail) simultaneously.When K is in position 2, second converter HLQ2 is connected to the low-pressure side of transformer B2, pass through switch operation, disconnect K1, connect the outlet that the high-pressure side of the second converter transformer B2 is serially connected with circuit L by K2 and K3, general controller makes the 1st group of converter HLQ1 still work in the idle static compensation work state of SVG type, make the 2nd group of converter HLQ2 be in inversion operating state, set up one to the high-pressure side of the second converter transformer B2 and be serially connected with on circuit with the voltage source of line voltage distribution same frequency.The foundation in the second converter transformer B2 high side voltage source is gained merit and idle transmittability to improve circuit, and make line current reach ice-melt operating current, set composite is in ice-melt operating state.
When carrying out ice-melt operation, the high-pressure side of the second converter transformer B2 in set composite must be serially connected with on a circuit in parallel circuit or loop network.For the radial supply line that can not form looped network and connect, can only improve the idle transmission of circuit on a small quantity and improve the voltage of load side, can not improve line current reaches ice melting current, therefore cannot realize the ice-melt to radial supply line.
Fig. 2 is the general controller theory diagram in set composite, is made up of measuring unit, control unit, signal output unit, protected location, display and instruction input unit etc.Measuring unit gathers busbar voltage, the electric current of DC ice-melting, the parameter such as direct voltage, output current of set composite of transformer station.Control unit, according to control command, makes output unit export different control signals and controls two groups of converters and work in reactive static and mend operating state or ice-melt operating state.Protected location carries out protecting and and the protection system coordinate operation of transformer station to set composite.Display and the instruction input unit display operating state of set composite and relevant parameter, and can artificial input control order.General controller can control set composite and work in SVG type reactive static benefit operating state or ice-melt operating state, and the control method of two kinds of operating states all uses existing sine pulse midth modification (SPWM) to control the work of converter.Difference is that control objectives is different, when reactive static mends operating state, general controller makes two groups of converters all according to the busbar voltage of transformer station height, or absorbs certain idle or send certain reactive power, its objective is that to keep substation bus bar voltage steady; When ice-melt operating state, general controller controls first group of converter and works in reactive static benefit state, now the major control target of the first converter be maintenance two groups of converters the terminal voltage of direct current capacitor that shares constant, make second group of converter to second group of converter B2 export one with circuit same frequency, variable alternating voltage, to change the exit potential of DC ice-melting, the balanced transmission strengthening the meritorious of circuit and reactive power, makes line current rise to ice melting current for controlling object (ice melting current is all greater than normal duty electric current).General controller can use existing techniques in realizing, and the present invention is not as emphasis narrating content.
Fig. 3 is on a circuit working in parallel circuit of set composite, and equivalent circuit diagram when being in ice-melt operating state and vectogram, describe the ice-melt operation principle of set composite in detail below in conjunction with Fig. 3.
In Fig. 3, two side systems are respectively
with
the impedance of DC ice-melting is X.Second converter transformer B2 high-pressure side injecting voltage phasor
represent, it can with
for running arbitrarily in the disk of end points.The receiving end power that can obtain system according to Fig. 3 (a) is:
And the second converter transformer B2 high-pressure side is not when sealing in circuit, receiving end power is:
Time second converter transformer B2 high-pressure side seals in circuit, suppose that transmission system issuing side and the voltage by terminal voltage and the second converter transformer B2 high-pressure side injected system are respectively:
the power that can obtain transmission system receiving end when the second converter transformer B2 high-pressure side seals in circuit is:
Equally, the receiving end power that can obtain when the second converter transformer B2 high-pressure side does not seal in circuit is:
The power that can obtain set composite transmission from formula is above
Can see, the power P of set composite transmission
cand Q
conly with
with
analog value and ρ relevant, and to have nothing to do with the phase angle difference of system both sides voltage.The high-pressure side winding being equivalent to the second converter transformer B2 is filled with an amplitude and the adjustable voltage of phase angle on the line
by right
regulate, namely can the change of control circuit trend.
The ice-melt operating state of set composite: be exactly by regulating the on high-tension side voltage of the second converter transformer B2 and phase place, changes circuit and gains merit and the transmission of load or burden without work, reach ice melting current to make line current.And promoting the process that line current arrives ice-melt operating current, is that the mode by changing line outlet voltage realizes, and the stable of circuit can not be destroyed.
Fig. 4 adopts the application schematic diagram of set composite of the present invention in the transformer station of a double bus scheme.In figure, 330KVM1,330KV M2 and 35KV M0 is three buses in First transformer station, M1 and M2 is double bus scheme.M3 and M4 represents the bus of second and the 3rd transformer station respectively.Be connected by two parallel circuit L1 with L2 between First and second transformer station, three transformer stations are linked to be looped network by circuit L3 and L4.The control switch 1DL of set composite runs on the bus of the 35KV of First transformer station, when diverter switch K runs on position 1, two groups of converter (HLQ1, HLQ2) equal parallel running is in the first converter transformer B1 low-pressure side, package unit works in reactive static and mends operating state, and the second converter transformer B2 is at shut down condition.During for carrying out ice-melt operation to a circuit (as L1), circuit L1 is only allowed to run on 330KV M1, other circuit (as L2 and L3) is made all to run on M2, close bus connection switch DL0, the both sides disconnecting link of high pressure lavatory winding of the second converter transformer B2 of closing makes the second converter transformer B2 bridge joint M1 and M2, now M1 and M2 equipotential, the high-pressure side of B2 does not have electric current and flows through.Diverter switch K in set composite is run on position 2, the output of the second converter transformer B2 is controlled by general controller, make the power flowing through the second converter transformer B2 high pressure winding equal with circuit L1, the electric current now flowing through bus connection switch DLO will be zero, disconnect bus connection switch DL0, the output controlling the second converter transformer B2 again makes the electric current of circuit L1 reach ice melting current with the through-put power strengthening circuit L1, enters ice-melt operating state.After ice-melt terminates, when the output controlling the second converter transformer B2 makes circuit L1 through-put power be reduced to its normal transmission power, now flowing through the on high-tension side electric current of B2 is zero, close bar coupler DL0, then cut the second converter transformer B2 on high-tension side both sides disconnecting link, set composite is out of service.In like manner can successively three-line not had a power failure ice-melt respectively.
Fig. 4 is a kind of application form of set composite in the bus arrangement of double-bus.Also can according to different bus arrangement types with the use of, when indivedual bus mode of connection coordinates with set composite is bad, also can adopt the method installing special ice-melt bus additional.
What provide in Fig. 4 is single line schematic diagram, and the second converter transformer B2 low-pressure side winding is triangle wiring both, may also be star-like connection, not shown in FIG..
The control switch 1DL of set composite, can design it and run on 35KV or 330KV bus.General idle static compensation equipment should run in low-voltage distribution network, therefore have employed the scheme connected on 35KV bus in the present embodiment.In addition, when low-voltage bus bar is identical with the voltage of converter AC, the first converter transformer B1 can save.
Claims (3)
1. the ice-melt that do not have a power failure is held concurrently SVG type reactive static plerosis locking device, it is characterized in that, have two groups of converter (HLQ1 at least, HLQ2), its DC side shares one group of direct current capacitor and forms commutation system back-to-back, the AC of first group of converter (HLQ1) is connected with the first converter transformer (B1) low-pressure side, the AC of second group of converter (HLQ2) switches disconnecting link (K) by first and can be connected with the low-pressure side of the first converter transformer (B1) or the second converter transformer (B2), the high-pressure side of the first converter transformer (B1) is connected to the ac bus of transformer station, the high-pressure side of the second converter transformer (B2) switches disconnecting link by second and is serially connected with on the circuit of wish ice-melt, set composite is by general controller controlling run,
General controller in set composite, is made up of measuring unit, control unit, signal output unit, protected location, display and instruction input unit;
Measuring unit gathers busbar voltage, the electric current of DC ice-melting, the direct voltage of set composite, the output current parameter of transformer station;
Control unit, according to control command, makes output unit export different control signals and controls two groups of converters and work in reactive static and mend operating state or ice-melt operating state;
Protected location carries out protecting also and the protection system coordinate operation of transformer station to set composite;
Display and the instruction input unit display operating state of set composite and relevant parameter, and can artificial input control order.
2. the ice-melt that do not have a power failure as described in claim 1 is held concurrently SVG type reactive static plerosis locking device, and it is characterized in that, when the first converter (HLQ1) AC voltage is equal with substation bus bar voltage, the first converter transformer (B1) saves.
3. the ice-melt that do not have a power failure according to claim 1 is held concurrently the using method of SVG type reactive static plerosis locking device, it is characterized in that, comprises following two kinds of operating states:
A) do not have a power failure ice-melt operating state: the AC of first group of converter (HLQ1) is connected with the low-pressure side of the first converter transformer (B1), the AC of second group of converter (HLQ2) is connected with the low-pressure side of the second converter transformer (B2), general controller controls first group of converter (HLQ1) according to SPWM control technology and is in reactive static benefit running status, controls second group of converter (HLQ2) and is in ice melting operation state;
B) reactive static mends operating state: two groups of converter (HLQ1 in set composite, HLQ2) AC, all be connected to the low-pressure side of the first converter transformer (B1), general controller controls two groups of converter (HLQ1 according to SPWM control technology, HLQ2) be synchronously in SVG type reactive static and mend running status, and the second converter transformer (B2) is in shut down condition;
Wherein, the described ice-melt operating state that do not have a power failure, on a circuit that the high-pressure side of the second converter transformer (B2) in set composite must be made to be serially connected with in parallel circuit or loop grid, for the radial supply line that can not form looped network connection, set composite can not realize ice-melt operation.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110410482.4A CN102412544B (en) | 2011-12-09 | 2011-12-09 | Power-uninterrupted ice melting and SVG-type reactive static compensation compound device and use method thereof |
| PCT/CN2012/086119 WO2013083064A1 (en) | 2011-12-09 | 2012-12-07 | Uninterrupted ice melting, svg type static reactive power compensation compound device and applying method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110410482.4A CN102412544B (en) | 2011-12-09 | 2011-12-09 | Power-uninterrupted ice melting and SVG-type reactive static compensation compound device and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102412544A CN102412544A (en) | 2012-04-11 |
| CN102412544B true CN102412544B (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110410482.4A Expired - Fee Related CN102412544B (en) | 2011-12-09 | 2011-12-09 | Power-uninterrupted ice melting and SVG-type reactive static compensation compound device and use method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102412544B (en) |
| WO (1) | WO2013083064A1 (en) |
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|---|---|---|---|---|
| CN102412544B (en) * | 2011-12-09 | 2015-07-15 | 贺长宏 | Power-uninterrupted ice melting and SVG-type reactive static compensation compound device and use method thereof |
| CN103036186A (en) * | 2012-12-14 | 2013-04-10 | 贺长宏 | Power-uninterrupted ice melting and SVG-type reactive static compensation compound device and use method thereof |
| CN103199477B (en) * | 2013-04-17 | 2015-09-09 | 国家电网公司 | A kind of circuit exchanges de-icing method and device |
| CN103337821A (en) * | 2013-06-09 | 2013-10-02 | 南方电网科学研究院有限责任公司 | Overvoltage protection and insulation coordination design method of direct current ice melting system |
| CN103730841A (en) * | 2013-11-22 | 2014-04-16 | 国家电网公司 | Capacitor circuit in transformer substation and transformer substation |
| CN103647278B (en) * | 2013-12-18 | 2016-04-20 | 国家电网公司 | A kind of Large Copacity Unified Power disturbing generating device |
| CN106229930B (en) * | 2016-09-18 | 2019-03-05 | 湖北科技学院 | A kind of DC power transmission line conductor ice prevention and static passive compensation device |
| CN106207863A (en) * | 2016-09-26 | 2016-12-07 | 南京工程学院 | A kind of based on the THE UPFC de-icing method of synchronization paralleling device between electrical network |
| CN107947193A (en) * | 2017-12-29 | 2018-04-20 | 江苏上能新特变压器有限公司 | New 35kV 220kV substations SVG or SVC electric power systems |
| CN111224367B (en) * | 2020-04-07 | 2021-07-16 | 梁家诚 | 10kV distribution line ice-melting system that does not have a power failure with voltage and reactive power optimization |
| CN113036800B (en) * | 2021-05-06 | 2023-05-23 | 贵州电网有限责任公司 | Flexible interconnection substation structure and control method |
| CN113868894A (en) * | 2021-11-01 | 2021-12-31 | 贵州电网有限责任公司 | Method for determining maximum reactive capacity of MMC type direct-current ice melting device |
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-
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- 2012-12-07 WO PCT/CN2012/086119 patent/WO2013083064A1/en active Application Filing
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| CN102412544A (en) | 2012-04-11 |
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